<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            width:300px;
            height:300px;
            background-color:red;
        }
    </style>
</head>
<body>
    <input type="text" id="ipt" />
    <script>
        const oIpt=document.getElementById("ipt");
        function center(e) {
            console.log("发送数据");
            console.log(e);
            console.log(this);
        }
        oIpt.onkeyup=debounce(center,500);
        function debounce(fn,time) {
            let timer=null;
            return function(e){
                clearTimeout(timer);
                timer=setTimeout(()=>{
                    center.call(this,e);
                },time);
            }
        }
    </script>
    
</body>
</html>